Apparatus and Method for Transmitting/Receiving Activation Indicator Regarding Component Carrier in Wireless Communication System

1. A method for supporting activation of serving cells by a user equipment (UE) in a wireless communication system, the method comprising: receiving serving cell configuration information transmitted from a base station through radio resource control (RRC) signaling, the serving cell configuration information indicates one or more secondary serving cells to be configured in the UE; configuring the indicated one or more secondary serving cells based on the received serving cell configuration information; receiving a medium access control (MAC) message comprising a logical channel identifier (LCID) and a MAC control element (MAC CE); determining, based on the LCID, whether the MAC CE includes activation information on the one or more secondary serving cells configured in the UE; in response to determining that the MAC CE includes the activation information, determining an activation group of secondary serving cell for the UE, wherein the activation group of secondary serving cell consists of one or more secondary cells, among the one or more secondary serving cells, indicated as a value of “1” by corresponding bits in the activation information; activating the one or more secondary cells included in the activation group of secondary serving cell; and receiving a downlink control channel or a downlink data channel from the base station or transmitting an uplink data channel to the base station by using the activated one or more secondary cells, wherein the activation information included in the MAC CE has a length corresponding to an integer multiple of 8 bits, wherein the least significant bit (LSB) of the activation information is set as a reserved bit, wherein the other bits of the activation information indicate the one or more secondary cells included in the activation group of secondary serving cell, wherein indices of the one or more secondary cells included in the activation group of secondary serving cell are identified based on an order starting from the LSB of the other bits of the activation information, and wherein the UE ignores a bit among the other bits of the activation information not corresponding to the one or more secondary serving cells configured in the UE.

2. A method for supporting deactivation of serving cells by a user equipment (UE) in a wireless communication system, the method comprising: receiving serving cell configuration information transmitted from a base station through radio resource control (RRC) signaling, the serving cell configuration information indicates one or more secondary serving cells to be configured in the UE; configuring the indicated one or more secondary serving cells based on the received serving cell configuration information; receiving a medium access control (MAC) message comprising a logical channel identifier (LCID) and a MAC control element (MAC CE); determining, based on the LCID, whether the MAC CE includes deactivation information on the one or more secondary serving cells configured in the UE; in response to determining that the MAC CE includes the deactivation information, determining a deactivation group of secondary serving cell for the UE, wherein the deactivation group of secondary serving cell consists of one or more secondary cells, among the one or more secondary serving cells, indicated as a value of “0” by corresponding bits in the deactivation information; and deactivating the one or more secondary cells included in the deactivation group of secondary serving cell, wherein monitoring a downlink control channel and/or a downlink data channel from the base station is stopped on the deactivated one or more secondary cells, wherein transmitting an uplink data channel to the base station by using the deactivated one or more secondary cells is stopped, wherein the deactivation information included in the MAC CE has a length corresponding to an integer multiple of 8 bits, wherein the least significant bit (LSB) of the deactivation information is set as a reserved bit, wherein the other bits of the deactivation information indicate the one or more secondary cells included in the deactivation group of secondary serving cell, wherein indices of the one or more secondary cells included in the deactivation group of secondary serving cell are identified based on an order starting from the LSB of the other bits of the deactivation information, and wherein the UE ignores a bit among the other bits of the deactivation information not corresponding to the one or more secondary serving cells configured in the UE.

3. A user equipment (UE) to support activation of serving cells in a wireless communication system, the UE comprising: a communication processor configured to: receive serving cell configuration information transmitted from a base station through radio resource control (RRC) signaling, the serving cell configuration information indicates one or more secondary serving cells to be configured in the UE; receive a medium access control (MAC) message comprising a logical channel identifier (LCID) and a MAC control element (MAC CE); configure the indicated one or more secondary serving cells based on the received serving cell configuration information; determine, based on the LCID, whether the MAC CE includes activation information on the one or more secondary serving cells configured in the UE; determine, in response to determining that the MAC CE includes the activation information an activation group of secondary serving cell for the UE, wherein the activation group of secondary serving cell consists of one or more secondary cells, among the one or more secondary serving cells, indicated as a value of “1” by corresponding bits in the activation information; activate the one or more secondary cells included in the activation group of secondary serving cell; and receive a downlink control channel or a downlink data channel from the base station or transmit an uplink data channel to the base station by using the activated one or more secondary cells, wherein the activation information included in the MAC CE has a length corresponding to an integer multiple of 8 bits, wherein the least significant bit (LSB) of the activation information is set as a reserved bit, wherein the other bits of the activation information indicate the one or more secondary cells included in the activation group of secondary serving cell, wherein indices of the one or more secondary cells included in the activation group of secondary serving cell are identified based on an order starting from the LSB of the other bits of the activation information, and wherein the UE ignores a bit among the other bits of the activation information not corresponding to the one or more secondary serving cells configured in the UE.

4. A user equipment (UE) to support deactivation of serving cells in a wireless communication system, the UE comprising: a communication processor configured to: receive serving cell configuration information transmitted from a base station through radio resource control (RRC) signaling, the serving cell configuration information indicates one or more secondary serving cells to be configured in the UE; receive a medium access control (MAC) message comprising a logical channel identifier (LCID) and a MAC control element (MAC CE); configure the indicated one or more secondary serving cells based on the received serving cell configuration information; determine, based on the LCID, whether the MAC CE includes deactivation information on the one or more secondary serving cells configured in the UE; determine, in response to determining that the MAC CE includes the deactivation information a deactivation group of secondary serving cell for the UE, wherein the deactivation group of secondary serving cell consists of one or more secondary cells, among the one or more secondary serving cells, indicated as a value of “0” by corresponding bits in the deactivation information; and deactivate the one or more secondary cells included in the deactivation group of secondary serving cell; stop monitoring a downlink control channel and/or a downlink data channel from the base station on the deactivated one or more secondary cells; and stop transmitting an uplink data channel to the base station by using the deactivated one or more secondary cells, wherein the deactivation information included in the MAC CE has a length corresponding to an integer multiple of 8 bits, wherein the least significant bit (LSB) of the deactivation information is set as a reserved bit, wherein the other bits of the deactivation information indicate the one or more secondary cells included in the deactivation group of secondary serving cell, wherein indices of the one or more secondary cells included in the deactivation group of secondary serving cell are identified based on an order starting from the LSB of the other bits of the deactivation information, and wherein the UE ignores a bit among the other bits of the deactivation information not corresponding to the one or more secondary serving cells configured in the UE.

5. A method for supporting activation of serving cells by a base station in a wireless communication system, the method comprising: transmitting serving cell configuration information to a user equipment (UE) through radio resource control (RRC) signaling, the serving cell configuration information indicates one or more secondary serving cells to be configured in the UE; determining an activation group of secondary serving cell for the UE, wherein the activation group of secondary serving cell consists of one or more secondary cells among the one or more secondary serving cells configured in the UE; generating, based on the determined activation group of secondary serving cell, activation information on the one or more secondary serving cells configured in the UE, the activation information indicating the one or more secondary cells included in the activation group of secondary serving cell as a value of “1” by corresponding bits in the activation information; transmitting a medium access control (MAC) message comprising a logical channel identifier (LCID) and a MAC control element (MAC CE), the LCID having a value that indicating the MAC CE includes the activation information; and transmitting a downlink control channel or a downlink data channel to the UE or receiving an uplink data channel from the UE by using the one or secondary more cells in the activation group, wherein the activation information included in the MAC CE has a length corresponding to an integer multiple of 8 bits, wherein the least significant bit (LSB) of the activation information is set as a reserved bit, wherein the other bits of the activation information indicate the one or more cells included in the activation group of secondary serving cell, and wherein indices of the one or more secondary cells included in the activation group of secondary serving cell are identified based on an order starting from the LSB of the other bits of the activation information.

6. A method for supporting deactivation of serving cells by a base station in a wireless communication system, the method comprising: transmitting serving cell configuration information to a user equipment (UE) through radio resource control (RRC) signaling, the serving cell configuration information indicates one or more secondary serving cells to be configured in the UE; determining a deactivation group of secondary serving cell for the UE, wherein the deactivation group of secondary serving cell consists of one or more secondary cells among the one or more secondary serving cells configured in the UE; generating, based on the determined deactivation group of secondary serving cell, deactivation information on the one or more secondary serving cells configured in the UE, the deactivation information indicating the one or more secondary cells included in the deactivation group of secondary serving cell as a value of “0” by corresponding bits in the deactivation information; and transmitting a medium access control (MAC) message comprising a logical channel identifier (LCID) and a MAC control element (MAC CE), the LCID having a value that indicating the MAC CE includes the deactivation information, wherein transmitting a downlink control channel or a downlink data channel to the UE by using the one or more secondary cells in the deactivation group is stopped, wherein monitoring an uplink data channel from the UE on the one or more secondary cells in the deactivation group is stopped, wherein the deactivation information included in the MAC CE has a length corresponding to an integer multiple of 8 bits, wherein the least significant bit (LSB) of the deactivation information is set as a reserved bit, wherein the other bits of the deactivation information indicate the one or more cells included in the deactivation group of secondary serving cell, and wherein indices of the one or more secondary cells included in the deactivation group of secondary serving cell are identified based on an order starting from the LSB of the other bits of the deactivation information.

7. A base station to support activation of serving cells in a wireless communication system, the base station comprising: a communication processor configured to: transmit serving cell configuration information to a user equipment (UE) through radio resource control (RRC) signaling, the serving cell configuration information indicates one or more secondary serving cells to be configured in the UE; determine an activation group of secondary serving cell for the UE, wherein the activation group of secondary serving cell consists of one or more secondary cells among the one or more secondary serving cells configured in the UE; generate, based on the determined activation group of secondary serving cell, activation information on the one or more secondary serving cells configured in the UE, the activation information indicating the one or more secondary cells included in the activation group of secondary serving cell as a value of “1” by corresponding bits in the activation information; transmit a medium access control (MAC) message comprising a logical channel identifier (LCID) and a MAC control element (MAC CE), the LCID having a value that indicating the MAC CE includes activation information on the one or more secondary serving cells configured in the UE; and transmit a downlink control channel or a downlink data channel to the UE or to receive an uplink data channel from the UE by using the one or more secondary cells in the activation group, wherein the activation information included in the MAC CE has a length corresponding to an integer multiple of 8 bits, wherein the least significant bit (LSB) of the activation information is set as a reserved bit, wherein the other bits of the activation information indicate the one or more cells included in the activation group of secondary serving cell, and wherein indices of the one or more secondary cells included in the activation group of secondary serving cell are identified based on an order starting from the LSB of the other bits of the activation information.

8. A base station to support deactivation of serving cells in a wireless communication system, the base station comprising: a communication processor configured to: transmit serving cell configuration information to a user equipment (UE) through radio resource control (RRC) signaling, the serving cell configuration information indicates one or more secondary serving cells to be configured in the UE; determine a deactivation group of secondary serving cell for the UE, wherein the deactivation group of secondary serving cell consists of one or more secondary cells among the one or more secondary serving cells configured in the UE; generate, based on the determined deactivation group of secondary serving cell, deactivation information on the one or more secondary serving cells configured in the UE, the deactivation information indicating the one or more secondary cells included in the deactivation group of secondary serving cell as a value of “0” by corresponding bits in the deactivation information; and transmit a medium access control (MAC) message comprising a logical channel identifier (LCID) and a MAC control element (MAC CE), the LCID having a value that indicating the MAC CE includes deactivation information on the one or more secondary serving cells configured in the UE, wherein the communication processor is configured to stop transmitting a downlink control channel or a downlink data channel to the UE by using the one or more secondary cells in the deactivation group, and wherein the communication processor is configured to stop monitoring an uplink data channel from the UE on the one or more secondary cells in the deactivation group, wherein the deactivation information included in the MAC CE has a length corresponding to an integer multiple of 8 bits, wherein the least significant bit (LSB) of the deactivation information is set as a reserved bit, wherein the other bits of the deactivation information indicate the one or more cells included in the deactivation group of secondary serving cell, and wherein indices of the one or more secondary cells included in the deactivation group of secondary serving cell are identified based on an order starting from the LSB of the other bits of the deactivation information.